Improved pipe-wrench



UNITED STATES PATENT OEEIGE AMOS OALL, OF SPRINGFIELD, MASSACHUSETTS,fASSIGNOR TO THE BEMIS 85 CALL HARDWARE AND TOOL COMPANY, OF SAME PLACE.

IMPROVED PIPE-WRENCH.

Specification forming part of Letters Patent No. 57,621, dated August28, 1866.

4 To all whom 'it may concern Be it known that I, AMOS CALL, ofSpringalternately grasping and letting go its hold. The upper jaw, K, isplaced over the pipe or field, Hampden county, Commonwealth of otherround body to be turned, andthe lower l\Iassachusetts, have invented anew and Improved Iipe-E'Trench; and I do` hereby declare that thefollowing` is a full and exact description thereof, reference being hadto the accompanying drawing, and to the letters of reference markedthereon.

The drawing represents a side view of this invention, which is ot' theclass known as pipewrenches,77 and used to grasp and force around pipesand other similar articles.

sists of a piece, A, provided at one end with a handle, B, and having ascrew, C, cut upon it. At its upper end it is bent around, forming theupper jaw, K, of the wrench. Upon this piece runs the nut D, andattached to D, at its upper end, I place the part E, which lit-s overand slides on the main part A. This piece E is tted at the upper andlower end, Where it embraces the part A in such a manner as to have aslight lateral play, and the spring F is inserted to keep the frontside, G, ofthe piece against the part A. In the upper part of this pieceE, I insert the piece H, having its upper surface formed in teeth, sothat it may catch and hold on the pipe more readily.

This Wrench is operated, like other pipe- Wrenches, by aforward-and-backward motion,

jaw screwed up until the piece H strikes the pipe, and at this time theutility of the spring F is shown, in the insertion ot' which andcombination with the other parts this invention consists; for it' thispart E is fitted rigidly it cannot be screwed up hard enough but that itwill slip on some of the different sizes to which it is applied, and ifit is made loosely or pivoted at the bottom, as soon as it is turnedback to take a new hold on the pipe the grasp Its constructionI will nowdescribe. It conl is lost, and cannot be regained without pushing thepiece H up against the pipe. This operation is performed by the springF, which keeps the jaw up to the pipe, and tightens upon it as thewrench is turned, and also allows the jaw to adapt itself to varioussizes of pipe more readily.

Now, having described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination of the spring F With the parts A and E of the Wrench,when arranged and operating substantially in the manner and for thepurpose herein described.

AMOS GALL.

Witnesses:

J. B. GARDINER, WM. C. BEMIs.

